Incrementing platen

ABSTRACT

In a printer, character-bearing type elements moving along a print line selectively impact a ribbon against a document backed by a platen to print on the document. The platen is automatically retracted at the end of each print cycle to provide adequate clearance for advancing the document for the next line of printing, whereupon it is advanced so as to provide an optimum space relation with the type elements for printing the next line.

Unite States Patent Inventors Appl. No.

Filed Patented Assignee John E. Drejza Endwell; 1

Donald F. Manning; Robert E. Pelkie, Endicott, N.Y.

June 25, 1969 Apr. 27, 1971 International Business Machines Corporation Armonk, N.Y.

INCREMENTING PLATEN 10 Claims, 33 Drawing Figs.

U.S.Cl.....

Int Cl Field of 101/93 0),

93 (MN), 93 (R) References Cited UNITED STATES PATENTS 12/19 59 Wooding 12/1961 Amada 12/1965 Cunningham 3/1966 Cunningham Primary'ExaminerRussell R. Kinsey AttorneysFrancis V. Giolma and Hanifin and J ancin 101/93C 101/93C l0l/93C 101/93C ABSTRACT: In a printer, character-bearing type elements moving along a print line selectively impact a ribbon against a document backed by a platen to print on the document. The platen is automatically retracted at the end of each print cycle to provide adequate clearance for advancing the document for the next line of printing, whereupon it is advanced so as to provide an optimum space relation with the type elements for printing the next line.

mnmin zmn 3,576,164

sum 01 HF 28 IN VE N TORS JOHN E. DREJZA DONALD F. MANNING ROBERT E. PELKIE A TTOR/VE Y PATENTEU mmlsn $576,164

' sum 03 or 28 7% COMMAND LA TCHE 5 LOAD U C B TCH MAM/1 #5005 00mm our FIG. 2b l PATENTED APRZTIBYI 3; 576. 164

SHEET on HF 28 Sf/MM/WZ 560 a MIN/W1 M 156 CARR DEVICE END CTRL e50 guncu 1/0 RESET BUS our? j NoTBusws Q I & NOT BUS0UT5 1/ J WRITE LATCH n eusoummmz WW COMMAND um BUS sin a 0m #00 LATCHES NUTS-4 wimoz/r mammam/10 SET CCBREAD 6c BUS our 5 NOT 4,5 K

BJSOUTSNOTY a CCB CCBREAD GATE comm REGISTER READ Jsc LATCH I \{d SET SENSE fi a SENSE 1 NOT usour? BUS our -0 o\1.2 SENSE BUS our -01 3.4 LATCH /Y5d l I 0 CHANNEL OR COMMANDREG RESET 1/0 RESET- 75f CCBL0AD1 I l FIG. 2TL

PATENTEQ'APRNBTI 3,576,164

SHEET 05 0F 28 m f CCB ADDRESS Bus ROADWCE CCB 006 w ccs 0 C08 CONTROL F L E (O ace ADDRESS 202 C08 ADDRESS] REGISTER BUFFER CONTROL CARRIAGE RUNAWAY CARRIAGE so 201 400 MANUAL LOAD OR LATCH 9 POWER 0N RESET- CCB READ; cos LOAD OR m m f L 114 --a cca REG FLAG BUFFER comm 1546 W NOTCARJRIAGE com 19? NOTCARRSEULNGJ 1546 OR wcmmsgcmma a CARRIAGECOMPARE T 182 UNE OJ 150 CARRIAGE REG RESET NOTI CARRIAGE c9 FIG. 2d L PATENTED APR27 IBYI SHEET 08 HF 28 f r s W 8 m 3% hm w a M l W 4 6 R C66 E o 5 e E R S 4 R B Q N Cw A L C w I c 6 wwd c w I? COB ADDRESS 0 0R FLAG COB ADDRESS] Am w A N U R E G m R R A 0 I 0 N I CARRIAGE RUNAWAY r a UNE COUNTER 15 8| LINE COUNTER1 LINE COUNTER zLINECOUNTER RESET CARRlAGE co PATENTEU- APRZ? I971 NOT CARR CARRIAGE COMP NOT CARR REC COMP INNED CARR CO SETTLINC SS I DECODEA I BUFFER CONTROL SHEET CCB ADDRESS aus NOT CARRIAGE COMPARE I36 CCB DDRESS COUNTER GATE TRIGGER I80 CARRIAGE CLOCK START 95 VOE MA RESET CARRIAGE START LATCH if CARRIAGE co NOT PED DR PRINT SCAN 14s LINE COMPLETE CARR NOT SKIP CARR RUNAWAY CARRIAGE CARR so AFTER PR SU PWE SS A- ISETTLINC STORED CARR REC COMP$ RESET ss IAIN IES'II E IIIII 5 ss ,9 II5b STORED\ CCB m a m BUFFER 0R NOT CONTROL CARRIAGE CONTROL LATCH H3O CARRIAGE REG coIIP R0 \4TTC| CARR sEmIIIc 5s a CARR (:01

NOT cca ADD cm GTf---/ Flefzf PATENTEDAPRZTISYI 3576164 sum as or 28 CCB [\DDRESS BUS MEMORY 58 SELECT TIME GEN

PATENTED mam 3,576,164

sum 10 HF 28 l f T 60 fcu)c|uaus 77 w TR TR TR p TR 60-1 so-z 60-3 60-4 I 0 a MACH, RESET CLOCK osc ,62 64 I L CLOCK c ocxgglccen I RUN A VAN (R0) -01 TRIGGER4. TR

MACHINERQESET 1 ADAPTER CLOCK START CARR c OCK START 5 PRINT-WRITE CARRIAGE G0 SERVICE OUT SER I BUFFER CTRL FIG. 2k

PATENTEU APR27|971 3.576164 SHEET 1 2 or 28 BUS OUT R3 L 870 83 69 ,ccsEoAo M880 CCBEGISTER ,LSLNSE AMPLIFIER P QR P 4:50 XOR MANUAL DATAP E 87b 7 890 P egg 355E XOR BUSOUT 4 Ash g E 88b R $SEN5E AMPLHER 8% x0 ,IMJNUALDATM E 87 \BUS OUTS 87a a 886 cm; REGISTER FLAG v JLSENSE AMPLIFIER 4 0R XOR SMANUALDATAS W 4 a LATCH 89f BUS OUTS NOT cos LOAD 88d ,LSENSE AMPLIFIER 2 0R MANUAL DATA 6 87h 2 I E & LATCH! LBUS our 1 an I H HX8BG (SENSE AMPLIFIER 1 e SMANUAL DATA 1 8 1 OR 1 a b a LATCH I I @13 OUT 5 87k /CCB DATA BUS 88f sEysE AMPLIFIER FLAG OR F J MANUAL'DATH an HANUALM 87m F & LATCH INTER? CCBLOADCOM 1" PATENTEU APR27 ISYI SHEET 13 [1F 28 CARRIAGE FA-ILED uovE 5mm GE CHECK LATCH XOR -89d BUFFER courgo r- 75 v[I01 CCBLA 77 a CRRIAGEREGISITER cc R8 COMPARE ccsfi 16b 77a I 1 U4 OR a a I 76c 76d ccaa c054 CCRBOR cm m I w CCB 2 7 .4 BUS OUT 1 860 E g OCT 2 OR cc REGiSTER 0R 76f T JANUALDATM 36b 8 i 4034 a LATCH BUS OUT 2 86c /69 i m FEE 769 /BUSOUT OR cgnz 44mm 0m 2 86d 4 W LATCH m 1 \BUS OUT 3- ge OCR T OR C OR 2 J5 NOTSKIP 5 MANUAL um s 14 u 1 14s 0- LATCH ,QABRIAE a \BUSOUT4 569 LINE cm 14 "5b 85d 1 g FMANUAL SPACE /78d gcaAfkRllaAfieEf 5 a 1 a LMANUAL om 4 86h Mm W LATCH 858 nor PEDESTAl 0R nmvc :MANUALDATA o as; 85 SKIP L f gATE CARRIAGE REG. LATCH Am MAN RESET F. HAN LOAD W M ENTER a CARR REG REF- IG 2L L PAIEIIIEII APR27 l5?! SHEET 1n [1F 28 A UCB DATA RIGIsIEAII 1580 A550 IB EAI 15A, k 'J' E L LQ A SERVICE III I 8 Mb LINE BUSIN L a DRIVER j ,PLB DATA REGO a 1670 155C LINE BUS m2 Q ,Issd COHMANDREJECT 158C 0R LINE 'BUS IN 5,

a w DRIVER ADDRESS GEN BIT 0 158d ,Issf DAUREAD 1\57 y DIQIIPIJEER BUS IN 51 SERVICE IN 8 LINE aus IN6 ---4 CCB READ 151C fi -155h IN? SERVICE III & g DRIVER CHANNEL END. REG. 4 LINE -155i BUS lNP P can a g UCB DATA REM 16k ,ns g PLB DATA REG.4 ,flBb I XOR LXOR 1 1 DATA CHECK I l XOR ADD GEN BIT A XOR STATUS III 151d NOT sums L XOR I INHIBIT CCBBIT4 178d DEVICE END cIIEcII READ 1 SERVICE IN 8 INHIBIT PLC uca DATA REGS 158n 0R I 065 LOAD! PLB DATA REG.5

SENSE SERVICE MI 8 UCB VRC 7 ADD GEN ans ADDRESS CARRIAGE REGISTER RESET FIG. 2n

PATENTEDAPRZYIQYI 3576,16 1

SHEET 15 [1F 28 156d 69 189 L BUSOUTO o H 0 ,156b 1 LR I XOR 156c 1 2 LR 11899 18% 2 mm XOR 3 LR XOR BUSOUTODD y 4 LR 189f 4 1156f 5 LR I XOR s ,156h 1 LR 156i 7 BusouTR LR WRITE SINGLECYCLE ANDELB LOAD 3 P RX oRwRlTE, TRLRRRR r DATA ORCHEC UCB READ \(590 0R cos READ J OR READ JRITECOMMAND OR 82 H 5% ,uge LOAD 59b a 00B D OR SERVFCE 0m 84 DATA READ PTR OCK TART Rfi SERVICEIN DELAY ADA ECL s CHECKREAD J sET DATA READ 59d 'LOAD l SET ccB READ SET UCB READ 9 1 l SET CHECK READ H 'CARRlAGE REG RESET PATENTEDEAPRZYIQYI 3,576,164

SHEET 150F28 ADAPTER CLOCK START SERVICE IN ICE IN CARRIAGE REG RESET FIG. 20

PA TENTEU APRZ'I I97! SHEET nofcm a mum -i 1 mm CARR co cm REG RESET FIG. 2p

1650 L 166a 1 4 comm smneo 165b OR my BUSY NOT OFF 1 m5 LATCH NOT BUSY NOTDEVICE END 5MP 7 fi 0R NAC HlNE RESET J 1r- -I 7 SET CARR cm con 166C 164th SERVICE m 16 c 0R CHANNEL con OUT DLY1 END -01 EN :4 LATCH CCBLOADCOII 16 ccBAoD" o+FLAc a 164C TIHE W3 l OR A READ LOAD 1656 J DEVICE SERVI m a SERVICE 92 m END comu OUTDELA'YH ATE SERVICE m OUT BREAD Q :OR STATUS u a 1 sm 1 86 PRINT READY 85 OR 3505010 I DEVICE 4 CARRREGRESET END LATCH SS uorovlci CLEAR ADAPTER |66f ENDSWLE 1/0 RESET 2; STATUSREGRST smusm ss BUS our P 1 SERVICE OUT a 4 I NOT BUSY 66g BU ouH INTERRUPT REQ CCBADDRESS1 PATENTEUAPRZYISH $576,1 4

sum 180F28 nor TEST v0 551 NOTNO 0p 1m NOT SET SENSE cm couu REG: 8

coummn OUT on 175 H COMMREG sT2--/ C 35901 com REG SET1'- CARR CONTROL NOTBUSY & 39 R mm CARR co SE VICE OUT W6C SENSE LATCHES cca LOAD s51 W BUS mm LATCH MACHINE RESET OR flYb FLACBHSAMPLE h m )mvm m cca LOAD cca LOAD me OR UMERS y BUS, OUT um 0,1,2 INVALID ccB ADDRESS1 OR 1130 v BUSOUH ma BUS OUTS ausomsu uv [176d 176b-.'cc B SET cca PARITY LOAD m wen PARITY LATCH me ucm CARR OR cmmumg I CHE'CKUGHT CARR FAlLUREw W e FIG 2 

1. The combination in a printer having a type carrier and an impact member on opposite sides of a document for performing a printing operation thereon of: operating means for adjusting the spacing between the type carrier and the impact member, carriage means for advancing the document between printing operations including a motor having carriage switch means operable to ON and OFF positions to control the advance of the document, and means for controlling the operating means to increase the spacing between the type carrier and the impact member each time the carriage means advances the document.
 2. The invention as defined in claim 1 characterized by the type carrier comprising a plurality of movable character bearing elements moving along a track and provided with actuating means to actuate the elements transversely of the track to impact the document against a platen impact member.
 3. The invention as defined in claim 2 characterized by the platen being movably supported for movement toward and away from the type carrier.
 4. The invention as defined in claim 3 characterized by the platen member being spring biased away from the type carrier and having electromagnetic operating means to advance it toward the carrier.
 5. The invention as defined in claim 4 characterized by the platen member being provided with electromagnetic latch means to latch the platen in an advanced position.
 6. The invention as defined in claim 5 characterized by circuiT means connected to respond to operation of the carriage switch means to the OFF position and connected to effect operation of the platen electromagnetic operating means.
 7. The invention as defined in claim 6 characterized by circuit means connected to respond to operation of the carriage switch means and connected to effect operation of the electromagnetic operating means and the electromagnetic latch means in timed relation.
 8. The invention as defined in claim 7 characterized by the electromagnetic latch means having a retract magnet winding for releasing the electromagnetic latch means.
 9. The invention as defined in claim 8 characterized by circuit means connecting the retract magnet winding to be energized by the carriage switch means when operated to the ON position.
 10. The invention as defined in claim 9 characterized by the electromagnetic operating means and the latch means being provided with bistable switch means and having set and reset operating conditions and carriage switch means being connected to reset said switch means for the electromagnetic operating means and the electromagnetic latch means when it effects energization of the retract magnet winding. 